Screw-holding screw driver



" July 13, 1943. J. HAGNESS SCREW-HOLDING SCREW DRIVER Filed Jan. 21, 1941 John H a BY INVENTOR.

Z1 95S A 7' TOR/\E Patented July 13, 1943 SCREW-HOLDING SCREW DRIVER John Hagness, Los Angeles, Calif., assignor to Russell W. Edwards, Los Angeles, Calif.

Application January 21, 1941, Serial No. 375,170

1 Claim.

Thi invention relates to tools and more espe-- cially to a screwholding screw driver.

An object of the invention is to provide a simple, practical and inexpensive tool of the character described.

Another object of the invention is to provide a screw driver capable of holding a screw preliminary to and during the screw tightening process.

Other objects and advantages 'will appear and be brought out more fully in the following specification, reference being had to the accompanying drawing, wherein Fig. 1 is a view, partly in section, showing an embodiment of my invention.

Fig. 2 is a sectional view taken along the line 2-2 of Fig. 1.

Fig. 3 is a view similar to Fig. 2 showing the tool in operative position.

Fig. 4 is a sectional view taken along the line 4-4 of Fig. 1.

Fig. 5 is a sectional view-taken along the line 5-5 of Fig. 3.

Fig. 6 is a perspective view of the cam member.

Fig. 7 is a perspective view of a wedge-pin member I5.

Referring more particularly to the drawing, I show a screw driver having a tubular handle portion In in which is positioned the end of a shank ll. Shank H has a flattened portion l2 providing abutments for a set screw l3 secured in handle portion l0. Shank l has the usual screw engaging point l4 and a bore l in which is rotatably positioned a wedge pin member I6.

Shank H has a recess l1 adapted to receive a collar l8 which is suitably secured to member l6 so as to prevent slidable movement of member IS in bore 15. Member IE has a tip l9 which is flattened on opposite sides and substantially of the same thickness as tip H, however of greater length than its thickness, so as to engage the sides of a screw slot when turned at right angles thereto; as clearly seen in the figures. A tubular cam member 20 is secured as by pin 2! in the upper end of handle portion Ill and has a cam slot 22 which engages the end portion 23 of member I6, which is formed at right angles to the axis of the tool as shown. The handle portion l0 may be provided with any suitable end construction such as a cap 24, as desired.

The operation of the invention will be clear from the foregoing description. The tool is placed with bit It in a screw slot as shown in Fig. 2 with shank H extended, and when shank l I is retracted by pressure on end 24 to the position shown in Fig. 3,' end portion 23 will be caused to move in cam slot 22 and turned degrees. This will cause tip H! to turn crosswise in the screw slot, Fig. 5, and wedge in the same and. thus the screw will be tightly held while it is being started in a screw hole. When handle portion I0 i retracted, the reverse movement with respect to shank II will cause tip I! to turn parallel to tip l4 and release the engagement with the screw slot.

Having described my invention, what I claim is:

A tool as described comprising a tubular handle, a tubular shank axially slidable but nonrotatably mounted in said handle and having a screw slot engaging tip portion, a wedge pin member rotatably but non-slidably mounted in the bore of said shank and having a wedge tip portion co-terminal with said shank tip portion, and means to rotate said member substantially 90 degrees when said handle is moved with respect to said shank by pressure applied to said handle, said means comprising acam groove in the bore of said handle and a lateral projection on. said pin member adapted to engage said cam groove.

JOHN HAGNESS. 

